import numpy as np
import csv
import random
from datetime import datetime
from time import strftime


if __name__ == "__main__":
    print "begin at " + getCurTime()

    a = np.zeros((20,2))
    for i in range(len(a)):
        a[i,0] = i
        a[i,1] = i*7
        
    print a[a[:,-1]>70,:]
    
    print "end at " + getCurTime()
    print "==========================="